Grey Light Brown vs AMT-1 Lt. Grey. Brown

How close are they?

ΔE 6.3, close: similar, with a visible difference side by side. AMT-1 Lt. Grey. Brown is more saturated than Grey Light Brown.

Can I use AMT-1 Lt. Grey. Brown instead of Grey Light Brown?

Usually, if you are not matching paint already on the model. Close match (ΔE 6). AMT-1 Lt. Grey. Brown is more saturated than Grey Light Brown.

Can I use Grey Light Brown instead of AMT-1 Lt. Grey. Brown?

The same difference applies the other way round: Grey Light Brown is more muted.

ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.